Claims
- 1. A smoke-retardant composition comprising
- (a) a poly(vinyl chloride) homopolymer or copolymer with up to about 50% by weight of at least one other olefinically unsaturated monomer, and
- (b) a smoke-suppressant amount of a heterocyclic compound of the formula ##STR11## where R' is hydrogen or C.sub.1 to C.sub.8 linear or branched alkyl carboxylate, and R" is hydrogen, C.sub.1 to C.sub.8 linear or branched alkoxy, C.sub.1 to C.sub.8 alkoxy substituted linear or branched C.sub.1 to C.sub.8 alkoxy or furfuryloxy.
- 2. The smoke-retardant composition of claim 1 wherein said heterocyclic compound is present in a total amount of from about 1 to about 80 parts per 100 parts of said halocarbon polymer.
- 3. The smoke-retardant composition of claim 1 additionally comprising a smoke suppressant synergistic amount of an oxide, hydroxide or salt of zinc.
- 4. The smoke-retardant composition of claim 3 wherein said oxide, hydroxide or salt of zinc oxide in about 0.01 to about 20 parts per 100 parts of said halocarbon polymer.
Parent Case Info
This is a continuation-in-part of U.S. patent application Ser. No. 766,953, filed Feb. 9, 1977, now abandoned.
US Referenced Citations (9)
Continuation in Parts (1)
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Number |
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Parent |
766953 |
Feb 1977 |
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